1. Solve all of the following formulas for the variables stated. (a) Solve for df 1= Ad At Hint: A means "change in", which implies that there should be a start and end point. Ad and At can both be "expanded". (b) Solve for a d= vit + - at? (c) Solve for Vi aAv At Hint: A means "change in", which implies that there should be a final and initial point. (d) Solve for T 2TTY T